CN219086445U

CN219086445U - Multi-liquid medium variable-pitch self-adaptive arc construction inhibition device

Info

Publication number: CN219086445U
Application number: CN202220921643.XU
Authority: CN
Inventors: 王巨丰; 王嬿蕾; 李�浩; 何琪文; 黄衍霖; 许兴游; 宋永锋; 卢杨; 贾征浩; 陈宇宁
Original assignee: Nanning Chaofu Electric Technology Co ltd
Current assignee: Nanning Chaofu Electric Technology Co ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2023-05-26
Anticipated expiration: 2032-04-20

Abstract

The utility model provides a multi-liquid medium variable-pitch self-adaptive arc construction inhibition device, which belongs to the technical field of lightning protection and arc extinction and comprises a tube body, a metal cover, a movable electrode, insulating oil, a liquid medium and a lower electrode, wherein the metal cover is arranged at one end of the tube body in a sealing manner, one end of the movable electrode is clamped in the metal cover, the other end of the movable electrode stretches into the tube body, the lower electrode is arranged at the other end of the tube body in a sealing manner, the liquid medium is arranged in the tube body, the insulating oil is arranged at the outer side of the movable electrode, and the interface between the insulating oil and the liquid medium is the bottommost end of the movable electrode. The utility model cuts off the electric arc rapidly, the electric arc discharges in the liquid to produce the liquid electric effect, the impact pressure wave is formed rapidly, the impact electric arc is cut off immediately when just forming, the liquid in the cover flows back into the arc extinguishing channel rapidly after the insulation strength is recovered and the arc extinguishing is finished, and the liquid is layered automatically, so as to prepare for the next arrival of lightning strike, reduce the carbon emission, and the liquid medium is safer and cleaner after replacing the valve plate, and can effectively reduce the carbon emission.

Description

Multi-liquid medium variable-pitch self-adaptive arc construction inhibition device

Technical Field

The utility model relates to the technical field of lightning protection and arc extinction, in particular to a multi-liquid medium variable-pitch self-adaptive arc construction inhibition device.

Background

When the power transmission line is struck by lightning, impact flashover is caused, so that a line insulator flashover is caused, and then a large power frequency freewheel is generated, so that an insulator string and hardware fittings are damaged, and line accidents are caused; if lightning strikes the transmission line or the lightning conductor, the transmission line may be broken, so that the transmission work cannot be performed. Therefore, a better arc extinguishing device is required to be designed, so that the insulator can be prevented from flashover, and the power frequency follow current can be effectively avoided.

Disclosure of Invention

The utility model aims to provide a multi-liquid medium variable-pitch self-adaptive arc construction inhibition device which solves the technical problems in the background art. The flashover channel is controlled to be in parallel gaps (namely arc extinguishing channels) when lightning strikes are carried out, the insulator (string) is protected from being broken down in lightning strike insulation, and the gaps are prevented from being broken down under power frequency overvoltage and operation overvoltage, so that misoperation is caused. This solves the problem of ineffective area of the insulation fit caused by the volt-second characteristic bulge.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a many liquid medium displacement self-adaptation arc suppression device of building, includes body, metal cover, movable electrode, insulating oil, liquid medium and bottom electrode, and the metal cover seals the one end that sets up at the body, and movable electrode one end card is established in the metal cover, and the other end stretches into in the body, and the bottom electrode seals the other end that sets up at the body, and liquid medium sets up in the body, and insulating oil sets up in the movable electrode outside, and the interface of insulating oil and liquid medium is movable electrode bottommost department.

Further, the metal cover is provided with a bolt rod and a nut which are fixed on the pipe body, the end part of the pipe body is provided with a pipe body top flat plate, the metal cover is arranged into a cap body structure, the bolt rod penetrates through the metal cover and the pipe body top flat plate and is fixed up and down by using the nut, the bolt rod is a plastic bolt rod, and a sealing ring is arranged between the metal cover and the pipe body top flat plate.

Further, the inner side of the metal cover is provided with a buckling ring, the upper end of the movable electrode is provided with a disc structure, and the disc structure is clamped at the upper end of the buckling ring and can move up and down.

Further, an elastic layer is arranged in the pipe body and is a plastic insulating layer.

Further, a reset spring is arranged in the metal cover, one end of the reset spring is connected with the movable electrode, and the other end of the reset spring is connected with the top inner side of the metal cover.

Due to the adoption of the technical scheme, the utility model has the following beneficial effects:

the utility model cuts off the electric arc rapidly, the electric arc discharges in the liquid to produce the liquid electric effect, the impact pressure wave is formed rapidly, the impact electric arc is cut off immediately when just forming, the liquid in the cover flows back into the arc extinguishing channel rapidly after the insulation strength is recovered and the arc extinguishing is finished, and the liquid is layered automatically, so as to prepare for the next arrival of lightning strike, reduce the carbon emission, and the liquid medium is safer and cleaner after replacing the valve plate, and can effectively reduce the carbon emission.

Drawings

FIG. 1 is a schematic view of the structure of the device of the present utility model;

fig. 2 is a schematic view of the structure of the device of the present utility model with a return spring.

In the drawing, a 1-pipe body, a 2-elastic layer, a 3-metal cover, a 4-movable electrode, 5-insulating oil, 6-liquid medium, 7-lower electrode, 8-buckle ring, 9-sealing ring, 10-pipe body top plate, 11-nut, 12-bolt rod and 13-reset spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail below by referring to the accompanying drawings and by illustrating preferred embodiments. It should be noted, however, that many of the details set forth in the description are merely provided to provide a thorough understanding of one or more aspects of the utility model, and that these aspects of the utility model may be practiced without these specific details.

As shown in fig. 1, the multi-liquid-medium variable-pitch self-adaptive arc construction inhibition device comprises a tube body 1, a metal cover 3, a movable electrode 4, insulating oil 5, a liquid medium 6 and a lower electrode 7, wherein the metal cover 3 is arranged at one end of the tube body 1 in a sealing manner, one end of the movable electrode 4 is clamped in the metal cover 3, the other end of the movable electrode stretches into the tube body 1, the lower electrode 7 is arranged at the other end of the tube body 1 in a sealing manner, the liquid medium 6 is arranged in the tube body 1, the insulating oil 5 is arranged outside the movable electrode 4, and the interface between the insulating oil 5 and the liquid medium 6 is the bottommost end of the movable electrode 4.

The pipe body 1 is an insulating shell and is made of elastic materials such as rubber materials, epoxy resin, nylon glass fibers or PC materials, so that the pipe body has certain deformability and cannot be broken when the hydro-electric effect occurs.

Is made of inorganic nonmetallic materials with high hardness, high temperature resistance and high pressure resistance and is cylindrical; the lower end of the backwash tube is provided with a lightning receiving electrode; the metal cover and the recoil tube are fixed together through a screw rod; the movable electrode is arranged in the metal cover and limits the movable position by limiting; the O-shaped ring is a rubber sealing ring with a circular cross section and is used for sealing and ensuring the sealing performance of containers such as a cylinder and the like.

The earth (cover) forms an upward flow injection channel through the electrode and the water medium, and controls the arc path to enter the arc extinguishing channel. The impact arc breakdown electrode discharges in water to generate 'liquid-electricity' effect impact wave to cut off the arc in water when struck by lightning, and the arc is short, so that the structure of the backflushing tube is not damaged by excessive pressure under the condition of ensuring arc extinction. The arc extinguishing shock wave drives the movable electrode to move for a distance of elongating the electrode, and the movable electrode enters the insulating oil layer, so that the elongation of the arc channel encounters the high-strength dielectric barrier of the insulating oil layer, and the arc extinguishing capability is continuously increased along with the increase of the distance. The arc extinguishing capability and the medium recovering capability are enhanced from two latitudes of the dimension and the strength. Because the inside of the cover is compressible air, space is provided for liquid to flow, and oil can drive pressure to form fluidity through pressure, so that momentum impact arc extinguishing effect is generated on the electric arc. After the arc extinction is finished, liquid in the cover can flow back into the arc extinction channel and automatically delaminate.

The diameters of the electrode head and the rod are equal, so that the damping effect of liquid on the rod displacement during the rod displacement is avoided, and the limiting clamp is used as an electric inflow ground contact while positioning the minimum clearance distance.

When the device is used in the field of gap extinction, the liquid medium 6 is in a weak conductive state, and if the device is used in the field of lightning arresters or lightning rods, the liquid medium 6 is in a near insulating state, and the resistance must reach tens of megaohms.

In the embodiment of the utility model, a metal cover 3 is provided with a bolt rod 12 and a nut 11 which are fixed on a pipe body 1, the end part of the pipe body 1 is provided with a pipe body top flat plate 10, the metal cover 3 is provided with a cap body structure, the bolt rod 12 penetrates through the metal cover 3 and the pipe body top flat plate 10 and is fixed up and down by using the nut 11, the bolt rod 12 is a plastic bolt rod, and a sealing ring 9 is arranged between the metal cover 3 and the pipe body top flat plate 10. The inside of the metal cover 3 is air, when the movable electrode 4 moves upwards, the air in the metal cover 3 is compressed, and then the compressed air resets the movable electrode 4. The movable electrode 4 is brought into contact with the metal cap 3 during both the movement and the resetting.

In the embodiment of the utility model, the inner side of the metal cover 3 is provided with the buckling ring 8, the upper end of the movable electrode 4 is provided with a disc structure, and the disc structure is clamped at the upper end of the buckling ring 8 and can move up and down. Snap ring 8 the snap ring 8 is a collar limiting the upper end of the movable electrode 4.

In the embodiment of the utility model, an elastic layer 2 is arranged in a pipe body 1, and the elastic layer 2 is a plastic insulating layer. The insulating elastic layer can insulate the elastic layer to increase the stress area, reduce the pressure in the pipe, the elastic material of the insulating elastic layer arranged in the insulating pipe is provided with small pits on the surface of the elastic material, the stress area of the inner wall of the insulating pipe is increased, the roughness of the surface is improved, and the requirement of the insulating pipe is protected.

The backwash tube is made of inorganic nonmetallic materials with high hardness, high temperature resistance and high pressure resistance and is cylindrical; the lower end of the backwash tube is provided with a lightning receiving electrode; the metal cover and the recoil tube are fixed together through a screw rod; the movable electrode is arranged in the metal cover and limits the movable position by limiting; the O-shaped ring is a rubber sealing ring with a circular cross section and is used for sealing and ensuring the sealing performance of containers such as a cylinder and the like.

The diameters of the electrode heads and the rods are equal, so that the damping effect of liquid on the rod displacement during the rod displacement is avoided. The limiting clamp is used as an electric inflow ground contact while positioning the minimum clearance distance.

In the embodiment of the utility model, as shown in fig. 2, a return spring 13 is arranged in the metal cover 3, one end of the return spring 13 is connected with the movable electrode 4, and the other end is connected with the top inner side of the metal cover 3. The return spring 9 is mainly used for quickly resetting the movable electrode 4, and can restore the long-time lightning current or continuous lightning current and protect the lightning current.

The self-adaptive arc establishment inhibition process comprises the following steps: lei Dianhu or flashover arc is introduced into the sealed tube body 1, a discharge channel is formed on the liquid medium 6 in the tube body 1, a liquid electric effect, a reflected shock wave superposition effect and a pascal effect are generated, a shock wave is formed, the discharge channel acts in a manner of impulse or impact pressure, because the movable electrode 4 is of a hard structure and is movable, when the movable electrode 4 is subjected to impulse or impact pressure, the movable electrode 4 moves upwards, the distance between the movable electrode 4 and the lower electrode 7 is prolonged, the movable electrode 4 completely enters the insulating oil 5, the arc channel is prolonged and encounters the insulating medium blocking of an insulating oil layer, the arc extinguishing capability is continuously increased along with the increase of the distance, the arc extinguishing capability and the medium recovering capability are enhanced from two latitudes of the dimension and the medium strength, the arc is extinguished, the nut 11 is unscrewed according to the working times or time, the metal cover 3 is taken away, and then the liquid medium 6 and the insulating oil 5 are sequentially added.

The liquid electric effect cuts off short electric arc in the liquid medium 6, cuts off long electric arc in the insulating oil 5, the lower end of the movable electrode 4 is positioned at the interface of the water medium and the insulating oil, the impact electric arc breakdown electrode discharges in water to generate liquid electric effect shock wave when struck by lightning, the short electric arc in water is cut off, the arc is short, under the condition of ensuring arc extinction, excessive pressure can not be generated to damage the recoil tube structure, meanwhile, the arc extinction shock wave generated by the liquid electric effect drives away the movable electrode, the distance between the electrodes is prolonged, the movable electrode 4 enters the insulating oil layer, the elongation of an arc channel encounters the high-strength medium blocking of the insulating oil layer, and the arc extinction capability is continuously increased along with the increase of the distance.

The compressible air in the metal cover 3 provides space for liquid to flow, when the electric arc discharges in the liquid, part of the liquid in the discharge channel is instantaneously vaporized, decomposed and ionized into high-temperature ions to expand, the pressure in the space is increased, and the insulating oil can move to the metal cover under the drive of the pressure to form fluidity, so that momentum impact arc extinguishing effect is generated on the electric arc.

After arc extinction, liquid in the metal cover 3 can flow back into the pipe body 1 and automatically delaminate, after arc interruption, the pressure in the metal cover 3 returns to standard atmospheric pressure, the liquid falls back to an arc extinction channel from the metal cover 3, because the density of the liquid medium 6 and the density of the insulating oil 5 are different, the density of the insulating oil 5 is low, the density of the liquid medium 6 is higher than that of the insulating oil 5, the insulating oil 5 is fat-soluble liquid and is water-insoluble, the automatic delamination is realized, the lower electrode 7 is submerged by the height of the liquid medium 6, and the movable electrode 4 is connected.

The specific process of the liquid-electricity effect is as follows: the liquid medium 6 adopts emulsion mixed liquid of oil and water or insulating oil, the oil is wrapped by water and then is connected into a piece through water, a complete water medium discharge channel is formed, the breakdown characteristic of single pure water medium is reserved, in the process of discharging an electric arc along the water medium, electric arc plasma is subjected to incompressibility restriction generated by wrapping of the insulating oil, pressure intensity and damping shock wave conduction pressure intensity are generated, the liquid cannot be deformed and displaced instantaneously due to short lightning arc impact time, at the moment, the mixed liquid can be regarded as shock wave transmission medium which cannot be compressed by itself, and compared with a medium which is harder to compress by common single liquid, the mixed liquid is higher in viscosity and higher in surface tension, so that the force of the emulsion mixed liquid in the original state can be increased, under the pressure effect generated by the electric arc space occupation breakdown mixed liquid, the pressure intensity of hundreds of megapascals is synchronously generated on the contact surface of the electric arc and the emulsion mixed liquid, the pressure intensity of the hundreds of megapascals is synchronously counteracted and the electric arc is eliminated, the incompressibility of the high-viscosity mixed liquid is ensured, meanwhile, the high-viscosity liquid can absorb more shock wave transmission medium can be regarded as the shock wave, the pressure intensity is reduced, and the damping shock wave is durable to the structure is improved.

In the process of dielectric oil breakdown by the hydraulic electric effect impact arc under the condition of dielectric oil, the volume occupation requirement is set for the dielectric oil in a very short time, because the viscosity of the dielectric oil is high, the displacement is not enough to yield the space occupied by the arc in a very short time, the strong countermeasure of the space position is formed between the occupation of the arc and the displacement of the dielectric oil, thereby the mechanical pressure peak shock wave of hundred megapascals is generated, the shock wave is reacted to the power frequency arc body, and the factors for improving the pressure peak value of the hydraulic electric effect shock wave and reducing the time of the pressure peak value of the hydraulic electric effect comprise: the insulation strength can improve the breakdown field strength, and meanwhile, a high field strength extremely fast electron collapse process is formed, so that the arc breakdown speed is improved, the sudden performance of the space occupation of an arc is increased, the space abdication speed is reduced due to the high viscosity of the insulating oil, a large amount of arc heat can be absorbed by the high specific heat capacity, and the arc temperature is reduced.

The elastic layer 2 also reflects fundamental waves of the hydro-electric effect, so that the fundamental waves act on an electric arc channel, the electric arc is more easy to extinguish, the instant pressure born by the pipe wall is reduced, and the explosion of the insulating pipe is avoided.

The specific process of the superposition effect of the reflected shock waves is as follows:

the shock wave and the reflected shock wave meet and overlap, the interference phenomenon occurs, the energy of vibration enhanced vibration is increased, when the electric arc enters an arc extinguishing channel containing emulsion mixed liquid, the temperature of plasma generated by liquid phase discharge is up to 1500-3000K, high temperature and high pressure generated in the channel cannot leak outwards in time, the shock wave is reflected back and forth on the inner wall surface of the arc extinguishing channel, and the reflected waves of the inner wall surface overlap each other, so that the overpressure peak value is increased.

If the emulsifier is an ionic surfactant, on the interface, the emulsion droplets are charged due to ionization and adsorption, and the charge size depends on ionization intensity; the non-ionic surfactant has friction effect to make the liquid drop have charge, and its charge size is related to the concentration of external phase ion, dielectric constant and friction constant, when the charged liquid drop is close to it, it produces repulsive force to make it difficult to coalesce, so that it can raise emulsion stability, and the charged liquid drop of emulsion can form electric double layer structure on two sides of interface, and the repulsive effect of electric double layer can produce great mechanical effect, and can produce reflective impact pressure in the interior of insulating tube to act on electric arc.

The specific process of generating the pascal effect is: the pressure change of a certain part of static fluid in the sealed tube structure is transmitted to all directions unchanged, and then the liquid medium around is impacted by larger acting force from a discharge channel in the insulated tube, the acting force bounces after striking against the wall of the insulated tube, the acting force with the direction pointing to the center of the insulated tube is formed, the impact pressure and the occupied pressure peak value are generated in the hydro-electric effect, the dual pressure sources are amplified together, the electric arc is intercepted, the longer the electric arc in the insulated tube is, the larger the acting force on the wall of the insulated tube is, and the larger the impact pressure for intercepting the electric arc is, so that the secondary reburning of the electric arc is prevented.

Be provided with elastic layer 2 on the body 1 inside wall, elastic layer 2 sets up to insulating elastic layer, insulating elastic layer increase stress area reduces intraductal pressure, and the elastic material of insulating elastic layer that sets up in insulating pipe has the pit on its surface, increases insulating pipe inner wall's stress area, also improves the roughness on surface simultaneously, because satisfy the relation between pressure and the area and be: p=f/S, i.e. the inverse ratio between the stress area and the pressure, after the insulating elastic layer is added in the pipe body 1 of the sealed pipe structure, the maximum pressure in the pipe is lower than before the elastic material is not added under the action of arc impact under the action of the arc impact in the pipe body 1 of the sealed pipe structure, so that the condition of explosion of the insulating pipe caused by the overlarge pressure in the pipe is avoided.

Meanwhile, the impact force generated by Pascal effect is avoided to directly impact the insulating tube, impact force is firstly formed on the elastic insulating material by the impact wave in the tube, the reaction force acting on the inner surface of the insulating tube is reduced, and the insulating tube with smaller hardness is prevented from being broken due to the impact of the reaction force.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims

1. A multi-liquid medium variable-pitch self-adaptive arc construction suppression device is characterized in that: including body (1), metal casing (3), movable electrode (4), insulating oil (5), liquid medium (6) and bottom electrode (7), metal casing (3) seal arrangement is in the one end of body (1), and movable electrode (4) one end card is established in metal casing (3), and the other end stretches into in body (1), and bottom electrode (7) seal arrangement is in the other end of body (1), and liquid medium (6) set up in body (1), and insulating oil (5) set up in movable electrode (4) outside, and the interface of insulating oil (5) and liquid medium (6) is movable electrode (4) bottom department.

2. The multi-liquid medium variable-pitch adaptive arc construction suppression device according to claim 1, wherein: the metal cover (3) is provided with a bolt rod (12) and a nut (11) to be fixed on the pipe body (1), the end part of the pipe body (1) is provided with a pipe body top flat plate (10), the metal cover (3) is arranged into a cap body structure, the bolt rod (12) penetrates through the metal cover (3) and the pipe body top flat plate (10) and is fixed up and down by using the nut (11), the bolt rod (12) is a plastic bolt rod, and a sealing ring (9) is arranged between the metal cover (3) and the pipe body top flat plate (10).

3. The multi-liquid medium variable-pitch adaptive arc construction suppression device according to claim 2, wherein: the inner side of the metal cover (3) is provided with a clamping ring (8), the upper end of the movable electrode (4) is provided with a disc structure, and the disc structure is clamped at the upper end of the clamping ring (8) and can move up and down.

4. The multi-liquid medium variable-pitch adaptive arc construction suppression device according to claim 1, wherein: an elastic layer (2) is arranged in the pipe body (1), and the elastic layer (2) is a plastic insulating layer.

5. A multiple liquid medium variable pitch adaptive arc construction suppression device according to claim 3, wherein: the inside of the metal cover (3) is provided with a return spring (13), one end of the return spring (13) is connected with the movable electrode (4), and the other end is connected with the top inner side of the metal cover (3).